Public pedal-powered electrical outlets - GIF

[hemmjo]

Back in the 80's when I was teaching. I put together a bike with a generator for students to demonstrate power and energy. It had 10 - 25 watt light bulbs. Each with a switch. Had a truck flywheel in place of the rear wheel and chain drive to the generator. After a student got the flywheel spun up, we would start switching bulbs on. No one was ever able to light all 10 bulbs. Not even the athletes.